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Drug Interactions between dextromethorphan and ketamine

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

dextromethorphan ketamine

Applies to: dextromethorphan and ketamine

Using ketamine together with dextromethorphan may increase side effects such as dizziness, drowsiness, confusion, difficulty concentrating, excessive sedation, and respiratory depression. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with ketamine. Also avoid activities requiring mental alertness such as driving, operating hazardous machinery, or engaging in potentially hazardous activities until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Drug and food interactions

Major

ketamine food

Applies to: ketamine

Using ketamine together with ethanol may increase side effects such as dizziness, drowsiness, confusion, difficulty concentrating, excessive sedation, and respiratory depression. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with ketamine. Also avoid activities requiring mental alertness such as driving, operating hazardous machinery, or engaging in potentially hazardous activities until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Moderate

dextromethorphan food

Applies to: dextromethorphan

Alcohol can increase the nervous system side effects of dextromethorphan such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with dextromethorphan. Do not use more than the recommended dose of dextromethorphan, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

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Moderate

ketamine food

Applies to: ketamine

Alcohol can increase the nervous system side effects of ketamine such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should not drink alcohol during treatment with ketamine. If you have received ketamine for anesthesia, you should avoid activities requiring mental alertness such as driving or operating hazardous machinery for at least 24 hours and until you know how the medication affects you. If you are taking ketamine orally, you should also avoid the consumption of grapefruit or grapefruit juice, which can significantly increase blood levels and side effects of the medication. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Therapeutic duplication warnings

Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.

Duplication

Nmda antagonists

Therapeutic duplication

The recommended maximum number of medicines in the 'NMDA antagonists' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'NMDA antagonists' category:

  • dextromethorphan
  • ketamine

Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.


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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.